Sunset behind Gale's western rim, Curiosity sol 587

A blue halo surrounds the just-set Sun in this 6-image mosaic taken by Curiosity on sol 587 (April 1, 2014). The Sun has just set behind the tall western rim of Gale crater.

NASA / JPL / MSSS / Don Davis

About this mosaic, Don writes: "I am assuming the preliminary release version JPEGs are in this case too blue overall, so I balanced the whole to make the far corners of the sky closer to a neutral gray. The area near the Sun should probably stand out as more blue, as shown here. I have also tried to tease more detail from the foreground to increase the apparent dynamic range of detail, more like how an observer would see it. Camera-induced vertical streaking has been manually suppressed."